fix: auto-publish approved blog submissions on approval

Approved user submissions now import into the blog automatically, with a
backfill script for existing approvals and a WebSocket polyfill so backend
Nostr relay queries work on Node 20.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/package-lock.json

@@ -20,7 +20,8 @@
         "nostr-tools": "^2.10.0",
         "slugify": "^1.6.8",
         "ulid": "^3.0.2",
-        "uuid": "^11.0.0"
+        "uuid": "^11.0.0",
+        "ws": "^8.21.0"
       },
       "devDependencies": {
         "@types/cors": "^2.8.17",
@@ -30,6 +31,7 @@
         "@types/morgan": "^1.9.10",
         "@types/multer": "^2.1.0",
         "@types/uuid": "^10.0.0",
+        "@types/ws": "^8.18.1",
         "prisma": "^6.0.0",
         "tsx": "^4.19.0",
         "typescript": "^5.6.0"
@@ -807,6 +809,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -2553,6 +2565,27 @@
       "engines": {
         "node": ">= 8"
       }
+    },
+    "node_modules/ws": {
+      "version": "8.21.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.21.0.tgz",
+      "integrity": "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
     }
   }
 }